Thanks for your reply and the link, it’s helpful to know this is not an isolated issue and might be scene specific.
I found a potentially related issue on the Unreal dev forums, where the crash was caused by a directional light blueprint with an excessively high distance. Changing the distance back to the default for distance field shadows solved that crash. Could you try reducing the DistanceField Shadow Distance or DistanceField Trace Distance (under Distance Field Shadows > Advanced on the Directional Light) and see if that helps?
Without a good repro case it will be difficult to debug this further given its intermittent character, but knowing the number of planes that fails the assert (using checkf) can provide another clue. It might also be related to setting the graphics settings to High or Epic when in PIE mode.
Thanks,
Sam